(19)

(11)

EP 4 115 219 A1

(12)

(43) Date of publication: 11.01.2023 Bulletin 2023/02 (21) Application number: 21709184.2 (22) Date of filing: 02.02.2021

(51) International Patent Classification (IPC):  G02B 5/30(2006.01) (52) Cooperative Patent Classification (CPC): G02B 5/3083; G02F 1/13363; G02F 2413/02; G02F 2413/14; G02F 2413/13; G02F 1/133633 (86) International application number: PCT/US2021/016242 (87) International publication number: WO 2021/178090 (10.09.2021 Gazette 2021/36)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 05.03.2020 US 202016810714 (71) Applicant: META PLATFORMS TECHNOLOGIES, LLC Menlo Park, CA 94025 (US)	(72) Inventors: LEE, Yun-Han Menlo Park, California 94025 (US) WANG, Junren Menlo Park, California 94025 (US) LU, Lu Menlo Park, California 94025 (US) PENG, Fenglin Menlo Park, California 94025 (US) WANG, Mengfei Menlo Park, California 94025 (US) (74) Representative: Murgitroyd & Company  Murgitroyd House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)